Oilpan: move InspectorOverlay to the heap.

Source/core/inspector/InspectorOverlay.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 333 matching lines @@
     , m_drawViewSizeWithGrid(false)
     , m_omitTooltip(false)
     , m_timer(this, &InspectorOverlay::onTimer)
     , m_activeProfilerCount(0)
     , m_updating(false)
 {
 }
 
 InspectorOverlay::~InspectorOverlay()
 {
     ASSERT(!m_overlayPage);

[haraken, 2014/12/10 23:44:22]

I think this should be in #if !ENABLE(OILPAN).

[sof, 2014/12/11 08:11:10]

It checks that freePage() has been called, ensuring a tidy detach & dispose.
Oilpan or not.

 }
 
+void InspectorOverlay::trace(Visitor* visitor)
+{
+    visitor->trace(m_page);
+    visitor->trace(m_highlightNode);
+    visitor->trace(m_eventTargetNode);
+    visitor->trace(m_overlayPage);
+    visitor->trace(m_overlayHost);
+}
+
 void InspectorOverlay::paint(GraphicsContext& context)
 {
     if (isEmpty())
         return;
     GraphicsContextStateSaver stateSaver(context);
     FrameView* view = toLocalFrame(overlayPage()->mainFrame())->view();
     ASSERT(!view->needsLayout());
     view->paint(&context, IntRect(0, 0, view->width(), view->height()));
 }
 
@@ skipping 511 matching lines @@
     hideHighlight();
 }
 
 void InspectorOverlay::startedRecordingProfile()
 {
     if (!m_activeProfilerCount++)
         freePage();
 }
 
 } // namespace blink